The command can be used to search internet software repositories for rpm packages that map to your architecture, and automatically install or upgrade those packages on your system.

yum(Yellowdog Updater Modified)

Explanation:

YUM (Yellowdog Updater Modified):- It is a tool that is open source command-line and also a graphical based package management for linux systems based on RPM (RedHat Package Manager) .It allows users to easily search,update,install or remove software packages on a systems.YUM uses many third party repositories so that the packages can be installed automatically.

answer; 5,000 to 100.000 typical is the minimum coverage,now every state is different;